right now i have my bov and boost gauge connected to the intake manifold, and my greddy trust mbc connected to turbo and wastegate, with the top nipple on the wastegate open. my hks ssqv chatters like crazy and only chatters, no whistle. i've never heard another hks ssqv sound like this one, so im guessing its compression surge. someone help me with the sources.
i have 2 on my wg, 2 on manifold, 2 from mbc and 1 from turbo.
i need to connect - turbo, wg, mbc, bov, boost gauge

 

Why not "T" off the brake booster

 

Try a better vacuum source with bigger vacuum hose. Don't know about the HKS but my bov needs cleaning sometimes or the valve starts to stick.

 

I just went with a GE vacuum manifold. Much cleaner and you get a good source

 

Ok, you'll have to read this like 7 or 8 times before it all makes sense but here goes...

Your bottom wastegate port needs a boost source before the throttle body, (like the nipple on the compressor housing), You will run that line to the "in" side of your boost controller, and you will need to "t" in to that line and run another line to the bottom port of the WG. Now run another line from the "out" side of the boost controller to the top port of the WG. Now the boost controller and the WG are taken care of. If you don't have a nipple in your compressor, I reccomend drilling one of the intercooler endtanks and tapping it.

The BOV should have it's own line running directly to manifold vacuum (nothing "t'd" in to it)

The boost gauge could be "t'd" in to pretty much any of the vac sources on the mani.

If you don't have enough ports on the intake mani I would second the recomendation that you invest in a golden eagle vacuum manifold.

 

so to break things down, you are saying to
1. t the bottom port on wg and turbo together and run them to the inside port on mbc

2. outside line on mbc goes to top port on wg??? if this is correct this is how i will do it

 

Please forgive this absolutely awful illistration but I think that this will get the point across better than a words will...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C &raquo;</TD></TR><TR><TD CLASS="quote">

The BOV should have it's own line running directly to manifold vacuum (nothing "t'd" in to it)

</TD></TR></TABLE>

are you sure?

i think i have only 3 vac ports on my IM (FPR/brake booster/ FORGOT THE LAST ONE (not a map)

i tee'd my bov to the FPR and the boost gauge to the thing that i dont remember its name.

is it wrong?

(still building the car, i didnt crancked it yet)


Modified by RACEPAK at 2:20 AM 5/14/2005


Modified by RACEPAK at 2:20 AM 5/14/2005

 

this is what i do, it work flawlessly.

bottom wastegate port should come from a vacuum source as close to the manifold as possible. i have mine t' off the brake booster before the checkvalve. since you have a boost controller put it inline here, but return it to any vacuum source, like the manifold. dont put it to the top of the wastegate, that port is for electronic boost controllers(unless u have an electronic, i dont remember). the blow off valve can go off the fuel pressure regulator vacuum line. if you are concerned about it not working properly, then make it be the only thing coming from that specific vacuum source. boost gauge you can pull from anything, but again try to keep it as close to the manifold as possible

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C &raquo;</TD></TR><TR><TD CLASS="quote">Please forgive this absolutely awful illistration but I think that this will get the point across better than a words will...

</TD></TR></TABLE>

Thats wrong... you dont use the top port on the wastegate for a MBC.... you only run the top port if you are using an electronic boost controller.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xtremeness101 &raquo;</TD></TR><TR><TD CLASS="quote">

Thats wrong... you dont use the top port on the wastegate for a MBC.... you only run the top port if you are using an electronic boost controller.</TD></TR></TABLE>

Actually this is how I have mine hooked up and it works perfectly! Do you really think the WG can tell the difference between a EBC and a MBC, I don't. Besides they both use the same method to control boost so it doesn't matter at all.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RACEPAK &raquo;</TD></TR><TR><TD CLASS="quote">

are you sure?

i think i have only 3 vac ports on my IM (FPR/brake booster/ FORGOT THE LAST ONE (not a map)

i tee'd my bov to the FPR and the boost gauge to the thing that i dont remember its name.

is it wrong?

(still building the car, i didnt crancked it yet)


Modified by RACEPAK at 2:20 AM 5/14/2005


Modified by RACEPAK at 2:20 AM 5/14/2005</TD></TR></TABLE>

It's not "wrong," and I'm sure it will still work just fine...but things always seem to work better when they have their own deticated vac source, at lease in my experience.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C &raquo;</TD></TR><TR><TD CLASS="quote">

Actually this is how I have mine hooked up and it works perfectly! Do you really think the WG can tell the difference between a EBC and a MBC, I don't. Besides they both use the same method to control boost so it doesn't matter at all. </TD></TR></TABLE>

yea but it is pointless to do it that way because you are just adding an extra vaccuum line that is not necessary... you simply put the MBC inline from your vaccuum source to your bottom port of your wastegate... done

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xtremeness101 &raquo;</TD></TR><TR><TD CLASS="quote">

yea but it is pointless to do it that way because you are just adding an extra vaccuum line that is not necessary... you simply put the MBC inline from your vaccuum source to your bottom port of your wastegate... done </TD></TR></TABLE>

Hmmm, I guess I never thought of it like that, maybe I'll have do do a comparison.

 

one problem with my mbc. it's a greddy trust variable valve controller. IT DOESN"T hAVE AN IN AND OUT!!!! so a safe assumption to add is that i should "T" the bottom port on wg to a vacuum source-Manifold, but then what about the bov and boost gauge. id have to t one of them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C &raquo;</TD></TR><TR><TD CLASS="quote">Please forgive this absolutely awful illistration but I think that this will get the point across better than a words will...

</TD></TR></TABLE>
ill just go with what you said. everything else sounds too confusing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xtremeness101 &raquo;</TD></TR><TR><TD CLASS="quote">
Thats wrong... you dont use the top port on the wastegate for a MBC.... you only run the top port if you are using an electronic boost controller.</TD></TR></TABLE>

Actually that IS wrong. The top port's line should have a vent between the MBC and the port. Because it doesn't matter how small you make the hole in the MBC, eventually pressure will equalize on both sides of the line unless you vent it somehow.

I think most aftermarket kits have a vent internal to the MBC... not too sure on that though.

 

ill just run a t fitting b/w the top port and the mbc and see how that works

 

the turbonetics MBC instructions are exactly what that guys shady drawing shows... thats how i have mine hooked up. i just followed the directions from turbonetics.

 

Pull the intake manny off and ditch all the stock vacuum fittings. Drill them out to 7/16 and tap 1/8 npt. Then you have adequate flow to everything that needs a vacuum or boost signal. Go to the hardware store and get 1/8 npt threaded fittings with 3/16 or 1/4 barbed nipples. I did this tonight on my Miata since I have downtime waitng for a new alternator. I also took apart my SX regulator and drilled and tapped it for to use 1/8npt fittings. Don't T anything if you don;t have to. Just add another port to the manifold.